Diagnostic and common features used for the field recognition of paleosols (Retallack, 1992).

Classification of paleosols into the U.S. soil taxonomy using field and petrographic characteristics (Retallack, 1992).

Eh-Ph classes of paleosols and the kinds of fossils preferentially preserved in them (Retallack, 1998).

Two reconstructed Oligocene paleosols from Badlands National Park and the size distribution of fossil mammals found in them (top pair graphs) also corrected for dissolution proportional to surface area (bottom pair of graphs: Retallack, 1988).

Relationship between depth to calcic horizon and mean annual precipitation in modern calcareous soils on sedimentary parent materials (Retallack, 1994).

Sequence stratigraphic interpretation of temporally complete (right) and incomplete (left) successions of paleosols (Retallack, 1998).

A reconstruction of a seed fern, Pachytesta illinoensis, from Pennsylvanian coal measures of southern Illinois (Retallack and Dilcher, 1988).

Reconstructions of two species of Early Triassic quillworts from the Sydney-Bowen Basin of eastern Australia (Retallack, 1997).

Early Triassic global lack of coal is not reflected in paleolatitudinal shift of coal basins (left), but is followed by recovery to maximum average seam thickness and maximum seam thickness like that of the original Paleozoic evolution of peatlands (center) and is accompanied by complete overturn in peat-forming plants (right: Retallack et al., 1996).

Trace fossils (lower row) and marine and plant fossils (upper row) and reconstructed paleoenvironments for the Middle Triassic Torlesse Supergroup of New Zealand (Retallack, 1987).

Addition of the Coast Range, shift of volcanic arc and other tectonic changes during the Late Eocene in Oregon (Retallack, 1991).

Sequence of Cretaceous marine and Oligocene mammalian fossils from Badlands National Park, South Dakota (Retallack, 1983).

Large corkscrew burrows, Daimonelix circumaxillaris, of the burrowing beaver, Palaeocastor fossor, with smaller burrows of dung beetles, coprolites and fossil root traces from the Miocene Harrison Formation of western Nebraska, U.S.A. (Retallack, 1990).

Reconstructed fossil apes and other early Miocene mammals of southwestern Kenya (Retallack, 1991).

Abundance of stomates versus phytoliths as a discriminator between open grassland grasses and woodland grasses of Africa, indicating open country adaptation of three species of middle Miocene (14 Ma) fossil grass (solid symbols) from Fort Ternan, Kenya (Retallack, 1992).

Stepwise expansion of grasslands in the Great Plains of North America inferred from mollic character of paleosols and the depth to their calcareous nodular horizons (Retallack, 1987).

Back to Greg's Home Page

Back to the Department's Home Page

Last modified 1/9/98